Barrel-locking bolt for breakdown guns



(No ModeL) 2 sheets-sheet 1.

W; LEIST IKO.

BARREL LOCKING BOLT FOR BREAKDOWNGUNS. No. 554,525. Patented July 21, 15395.

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(No Model.) 2 Sheets-Sheet 2L W. LEISTIKO. BARREL LOCKING BOLT FOR BREAKDOWN GUNS. No. 554,525. Patented July 21, 1896.

.- UNITED S Ar s PAT T V OFFICE;

WILLIAM LEISTIKQ-OF GLENCOE, MINNESOTA.

BARREL-LOCKING B'O LT F O-R BREAKDOWN'G'U NS SPECIFICATION forming part of Letters Patent No. 564,525,dated July 21, isee. Application filed February 28, 1896. Serial ITO-581,168., (No model.)

To all whom it may concern: I Y

Be it known that I, WILLIAM LE'ISTIKO, a

citizen of the United States, residing at Glen.

coe, in the county of McLeod and State of Minnesota, have invented certain new and useful Improvements in Breakdown Guns, of which the following is a specification.

My invention relates to breakdown guns, and more particularly to the locking device for the barrels thereof;

In the accompanying drawings, Figure l is a perspective view'oflthe breech-block and a portion of thebarrelsin their locked position; Fig. '2, a longitudinalvertical section of Fig. 1; Fig. 3, a similar view showing the barrels unlocked; Figs.*4, 5, and 6, detail views, of

the rotary locking-bolt; 'andFigs; 7, 8, and 9 are detail views of several of theparts. .1

The invention relates to that class of breakdown guns which are designed to be unlocked throughthe medium of a top lever; It embodies the use of an oscillating lock'mounted withinthe breech-block. and'operated bythe top lever through intermediate connections. Under all prior constructions of which I am aware, wherein a locking-block of the same general character as the one employed by me has been used, the block has been mounted in and supported and guided wholly by the walls of the recess forming its seat. From a practical experience of many years in the handling and repair of such guns I have found that in many instances the parts become wedged or jammed and the gun rendered useless. My present invention is designed to obviate such difficulties. Y

Referring to the annexed drawings, A indicates the breech-block; B, the barrels suitably" pivoted thereto; G,the extension-rib of the barrels; D, the tang of the breechblock,

and E the trigger-plate.

The extension-rib is provided with a lateral opening a and a notch or recess a, both of which are designed to be. engaged by the oscillating bolt when the rib is seated with the mortise or channel b, formed in the breechblock for the reception of said rib,

F indicates the oscillating'bolt. It is supported and guided at its forward end in a circular seat 0, formed in the breech-block, while its rear end or wall is provided with a central opening 61.

G 'denotes'a bracket removabl y secured to the tang D, having. a laterally-extending, arm or lug e designed to fit within the. opening d and form a pivot and support for the rear end of the oscillating bolt F. r

ward ends, and being free from contact with the parts surrounding it throughoutits length, there is no possibility of its becoming cramped or locked against moven'i ent. I The bolt for the greater portion of its length is hollow, and

on its upper side is provided witha slot f, a second slot f extending laterally therefrom forming a tongue h; The slot f is designed to allow the lower part of the extension-rib to pass into the central'hollow portion of the bolt when the barrels are closed. Upon rotation of the bolt the tongue it enters and passes through the opening a, while the sidewall of the slot f enters thelrece'ss 'a'. v I A seat or notch gis formed in'the bolt'at its front end in line with the slot f, and is adapted to be engaged by a. spring-pressed latch or pin Gr when the barrels are unlocked. This pin is angular, preferably squarefin cross-section, and the recess within which it ,is seated is alsoof a similar shape, so'that the pin cannot turn, and must of necessity occupy its proper position. The spring G? tends at all times to keep the pin in its ele vated position unless it is forced downward by the rotation of the bolt.

The side faces of the pin G are cut away, forming-the inclined faces is is. These faces a permit an easier action-of the rotary bolt F upon the pin and facilitate the entrance of the pin into the recess 9 and its being forced therefrom when the bolt is moved.

The forward portion of the latch extends depressed by the extension-rib when the bar\ rels are closed, thus unlocking the bolt and Ice up iiififront of the bolt into the slot 1) when the barrels are open, and is designed to be the forward-and rear bearings of the bolt.

The power of the arm being applied farther from the axis of the bolt than could be done had the arni" its bearing in thcmiain. body of the bolt, greater leverage for turning said" bolt is secured, which isia point of material consequence. To permit free rotation of the bolt, the breech-block is cut away at this point, as will be clearly seen upon reference to Figs. 1, 2, and 3.

Upon reference to Fig. Git will be seen that the-outer end of the lever or arm J is so formed or bent down thatit stands at about an angle of forty degrees to the remainder of the arm.

' To secure proper clearance of the parts,

the pivot-point of the arm or lever J is below the axis of rotation of the bolt, but the inclination or bend given to the outer end of the arm-causes the axis of the bent port-ion and the axis of the bolt to coincide at a pointp in the yerticalshaft I in line with the axis of rotation of s'a'id'bolt.

'lheib It being supported at both ends and free. from contact with the breech -blocks throughout its length, and the power required for its rotation being applied at the center of its length between the supports, there is no possibility of the bolt becomingcramped or jammed and the gun rendered useless.

A spring K is secured between the breechblock and the trigger-plate, its end bearing against one side of the vertical shaft and tending to normally hold the bolt in its locked position. I

Having thus described my invention, what I claim is I 1. In a breakdown gun, the combination of the breech-block; a rotary lockingbolt mounted therein; a bearing in the breechblock for the front end of the bolt; a journalsu-pport for the rear end thereof; and means for rotating said bolt arranged to act thereon intermediate of its end bearings. 2. In a breakdown gun, the combination of the breech -block, a rotary locking-bolt mounted therein, a bearing for each end of the bolt; an extension on said bolt midway of its length; and means for rotating said bolt applied to said extension.

3. In 'a breakdown gun, the combination of the breech-block, a rotary locking-bolt mounted therein; a bearing for each end of 'said'boltg. an extension on said bolt midway of its length; a top lever and vertical shaft connected thereto; and an arm or lever pivoted to the vertical shaft and bearing'in the extension on thebolt. I A

4. In a breakdown gun, the combination of the breech-block; a recess formed therein of contact with said recess; and bearings or supports for theends of the bolt. 4

5'. "In; a breakdown gun, the combination of the breech-block;- a rotary locking-bolt mounted therein; support-s or bearings for the ends of the bolt; an; extension on said bolt midway its length; a seat or bearing within said extension; a top lever and a' vertical shaft connected thereto; an arm pivotally secured to the vertical shaft, the outer portion or section of said arm being bent downwardly formed on the bolt.

6. In a breakdown gun, the combination of the b'reechblock; a rotary locking-bolt mounted therein; a bearing formed in the breech-block for the forward end of said bolt; and a removable bracket secured to thetang of the breech-block and forming the. bearing or support for the rear end of the bolt.

of .the breech-block; -a rotary locking-bolt mounted therein; an an gular recess or socket Y formed in the breech-block contiguous to the rotary bolt; and an angular locking-pin seated within said recess or socket. i

8. In a breakdown gun, the combination formed in the breech-*block contiguous to the seated within said recess or socket and provided with the inclined faces k, as and for the purposes setforth.

In witness'whereof I hereunto set my hand in the presence of two witnesses.

' \VILLIAM LEISTIKO. Witnesses:

F. B. DEAN,

GOTTEID O. NEUBAUER.

a rotary locking-bolt mounted within but-out and having its end seated in the bearing of the breech -block; a rotary locking-bolt mounted therein; a polygonal recess or socket 7. In a breakdown gun, the combination I rotary bolt; and a polygonal locking-pin- 

